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Page count: 13

The first objective of the study was to investigate whether measurement of leaf fluorescence can predict the inhibition of plant growth by the herbicide metoxuron. The second objective was to investigate whether fluorescence can be used as a tool for optimizing adjuvants for metoxuron. Metoxuron inhibits photosynthesis and as a consequence increases leaf fluorescence. Fluorescence was used to monitor metoxuron activity shortly after foliar application to common lambsquarters (Chenopodium album L.), black nightshade (Solatium nigrum L), and pea (Pisum sativum L.).